fix service plan is nil issue for v1 testing

Change-Id: I4cb2dd667e52e4aa219aa720c7413b7e97a393bc
Signed-off-by: jgong <jgong@rbcon.com>
Reviewed-on: http://reviews.cloudfoundry.org/13042
Tested-by: CI Master <cf-ci@rbcon.com>
Reviewed-by: Pin Xie <pxie@vmware.com>